I just finished putting the insulation in our coop. Everything fits in snugly, but in the online video that I watched before tackling the project, the person stapled the paper flaps to the 2x4s. Is it really necessary to do this? I got this insulation from the Habitat For Humanity Restore, and had to cut ALL of it to fit. It was 23" wide and all of our gaps were narrower than that, so most pieces only have the flap on one side. I will be putting up some plywood and/or masonite to completely cover the insulation, so the girls won't be able to peck the insulation. All the pieces seem to fit nicely. Do I really need to staple all the fiberglass battings to the studs? Will the insulation eventually shift over the years if I don't? I would love to hear from anyone experienced in this. Thanks!